Hack saw



FIG. 1 is a perspective view of my new design.

FIG. 2 is a top view thereof.

FIG. 3 is a side view thereof.

FIG. 4 is a front view thereof.

FIG. 5 is a rear view thereof.

FIG. 6 is another side view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines showing a saw blade is included for the purposes ofillustrating environmental structure and forms no part of the claimeddesign.

The ornamental design for a hack saw, substantially as shown anddescribed.